| Hardware and OS | Microsoft Surface Duo | Oppo A3s |
| Operating system | Android 10 | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Octa-core (1x2.84 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485) | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | Qualcomm SM8150 Snapdragon 855 (7 nm) | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | Adreno 640 | Adreno 506 |
| Internal memory | 128GB 6GB RAM, 256GB 6GB RAM | 16 GB, 2 GB RAM |
| External memory | No | microSD, up to 256 GB (dedicated slot) |
| Display | Microsoft Surface Duo | Oppo A3s |
| Type | AMOLED | IPS LCD |
| Size | 8.1 inches, 195.4 cm2 | 6.2" inc |
| Resolution | 1800 x 2700 pixels, 3:2 ratio | 720 x 1520 px |
| Touchscreen | | capacitive touchscreen |
| Protection | Corning Gorilla Glass 5 | |
| Screen-to-Body Ratio | | 81.2% |
| Display area | | 95.9 cm2 |
| Display aspect ratio | | 19:9 (height:width) |
| Pixel Density | | 271 PPI |
| Colors | | 16M |
| Main Camera | Microsoft Surface Duo | Oppo A3s |
| Camera | 11 MP, f/2.0, 23mm (wide), 1.0µm, PDAF | |
| Features | HDR, panorama | |
| Video | 4K@30/60fps, 1080p@30/60/120/240fps, gyro-EIS, HDR | |
| Selfie camera | Microsoft Surface Duo | Oppo A3s |
| Camera | Uses main camera | |
| Features | HDR, panorama | |
| Video | 4K@30/60fps, 1080p@30/60fps, gyro-EIS, HDR | |
| Connectivity | Microsoft Surface Duo | Oppo A3s |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G Network | 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 19 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 46, 66 | LTE |
| Wi-Fi | | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| Network | | GSM / HSPA / LTE |
| SIM card | | Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth | 5.0, A2DP, LE, aptX Adaptive | 4.2, A2DP, LE |
| Edge | | Yes |
| GPRS | | Yes |
| NFC | No | |
| GPS | Yes, with A-GPS | Yes, with A-GPS |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A (CA) Cat18 1200/150 Mbps | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| Technology | GSM / HSPA / LTE | |
| USB | USB Type-C 3.1 | microUSB 2.0, USB On-The-Go |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | |
| Camera | Microsoft Surface Duo | Oppo A3s |
| Main camera | | 13 MP, Dual |
| Specs | | 13 MP, f/2.2, AF
-2 MP, f/2.4, depth sensor |
| Features | | LED flash, HDR, panorama |
| Video | | 1080p@30fps |
| Selfie camera | | 8 MP, Single |
| Multimedia | Microsoft Surface Duo | Oppo A3s |
| Loudspeaker | Yes | |
| 3.5 mm Jack | No | Yes |
| Radio | No | FM radio |
| Design | Microsoft Surface Duo | Oppo A3s |
| Body build | Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5) | |
| Body | Stylus support | |
| Colors | White | Red, Dark Purple |
| Dimensions | Unfolded: 186.9 x 145.2 x 4.8 mm
Folded: 145.2 x 93.3 x 9.9 mm | 156.2 x 75.6 x 8.2 mm |
| Weight | 250 g (8.82 oz) | 168 g |
| SIM | Nano-SIM, eSIM | |
| Battery | Microsoft Surface Duo | Oppo A3s |
| Type | Li-Po 3577 mAh, non-removable | |
| Charging | Fast charging 18W | |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Features | Microsoft Surface Duo | Oppo A3s |
| Sensors | Fingerprint (side-mounted), dual accelerometer, dual gyro, proximity, dual compass | |
| Other | Microsoft Surface Duo | Oppo A3s |
| Release date | | 2018, July |
| Sensors | | Accelerometer, proximity, compass |
